I uploaded both (YouTube) and "Echo" got blocked whilst "Living Proof" hasn't been and I noticed the same has happened with other uploaders.
Given this, and the fact "Echo" has Liz on and was produced by DJ Khalil - I think "Echo" was for Recovery. And "Living Proof"... not. So who knows what that's from.
Also, the content on Em's "Echo" verses sounds like something he would spit for his album, specifically Recovery. It's more condensed and managed. "Living Proof" feels more like a general underground track that forever floats around unassigned.














